This is a universally administered unicast address with a registered vendor prefix.
MAC addressB4:A8:28:00:00:00
OUIB4:A8:28
Vendor addressFloor 4th, Building B, Gaoxinqi Industrial Park, Liuxian 1st Road, district 67, Bao’an, Shenzhen, Guangdong,China Shenzhen Guangdong CN 518102
Block rangeB4:A8:28:00:00:00– B4:A8:28:FF:FF:FF
Address capacity16,777,216
TransmissionUnicast: addressed to a single device
AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority
RandomizationNot randomized
Derived modified EUI-64B6:A8:28:FF:FE:00:00:00
Possible IPv6 link-local derivationfe80::b6a8:28ff:fe00:0

The EUI-64 and IPv6 link-local fields are a mathematical derivation from this MAC address. They don't confirm the device currently uses that IPv6 address.

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